Jian Wang
“Click” Patterning of Self-Assembled Monolayers on Hydrogen-Terminated Silicon Surfaces and Their Characterization Using Light-Addressable Potentiometric Sensors
Wang, Jian; Wu, Fan; Watkinson, Michael; Zhu, Jingyuan; Krause, Steffi
Authors
Fan Wu
Michael Watkinson
Jingyuan Zhu
Steffi Krause
Abstract
Two potential strategies for chemically patterning alkyne-terminated self-assembled monolayers (SAMs) on oxide-free silicon or silicon-on-sapphire (SOS) substrates were investigated and compared. The patterned surfaces were validated using a light-addressable potentiometric sensor (LAPS) for the first time. The first strategy involved an integration of photolithography with “click” chemistry. Detailed surface characterization (i.e. water contact angle, ellipsometry, AFM, and XPS) and LAPS measurements showed that photoresist processing not only decreases the coverage of organic monolayers but also introduces chemically bonded contaminants on the surfaces, thus significantly reducing the quality of the SAMs and the utility of “click” surface modification. The formation of chemical contaminants in photolithography was also observed on carboxylic acid- and alkyl-terminated monolayers using LAPS. In contrast, a second approach combined microcontact printing (μCP) with “click” chemistry; that is azide (azido-oligo(ethylene glycol) (OEG)-NH2) inks were printed on alkyne-terminated SAMs on silicon or SOS through PDMS stamps. The surface characterization results for the sample printed with a flat featureless PDMS stamp demonstrated a nondestructive and efficient method of μCP to perform “click” reactions on alkyne-terminated, oxide-free silicon surfaces for the first time. For the sample printed with a featured PDMS stamp, LAPS imaging showed a good agreement with the pattern of the PDMS stamp, indicating the successful chemical patterning on non-oxidized silicon and SOS substrates and the capability of LAPS to image the molecular patterns with high sensitivity.
Citation
Wang, J., Wu, F., Watkinson, M., Zhu, J., & Krause, S. (2015). “Click” Patterning of Self-Assembled Monolayers on Hydrogen-Terminated Silicon Surfaces and Their Characterization Using Light-Addressable Potentiometric Sensors. Langmuir, 31(35), 9646-9654. https://doi.org/10.1021/acs.langmuir.5b02069
Journal Article Type | Article |
---|---|
Online Publication Date | Aug 25, 2015 |
Publication Date | Sep 8, 2015 |
Deposit Date | Jun 15, 2023 |
Journal | Langmuir |
Print ISSN | 0743-7463 |
Electronic ISSN | 1520-5827 |
Publisher | American Chemical Society |
Peer Reviewed | Peer Reviewed |
Volume | 31 |
Issue | 35 |
Pages | 9646-9654 |
DOI | https://doi.org/10.1021/acs.langmuir.5b02069 |
Keywords | Electrochemistry; Spectroscopy; Surfaces and Interfaces; Condensed Matter Physics; General Materials Science |
You might also like
Synthetic Strategies for FRET-Enabled Carbohydrate Active Enzyme Probes
(2021)
Book Chapter
Developments in the Chemical Synthesis of Heparin and Heparan Sulfate
(2021)
Journal Article
Subcellular localised small molecule fluorescent probes to image mobile Zn2+
(2020)
Journal Article
Downloadable Citations
About Keele Repository
Administrator e-mail: research.openaccess@keele.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search